<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<title></title>
</head>
<body>
	<script type="text/javascript">
		//函数的数据类型为 function
	function fn(){
		console.log("函数")
	}
	console.log(typeof fn)//fuction
	</script>
</body>
</html>